Joint for folding rules



May 15, 1923. O 1,455,042

` F. BU CK JOINT FOR FOLDING RULES Filed Nov. 15, i919 Aff-r 015A/E yo.

Patented May l5, 1923.

titi

frissonner; 'ori` saeiiniwgnionreaii, science ""saemnw, aaron-rennaconfionaceron'for'` infonieair.lI

To all whom t may concern. e

Be it known that l, F RED BUCK, a citi- Zen of the United States,.and aresident of Saginaw, county of Saginaw, and State of li'lichigan, haveinvented anew and useful Improvement in Joints for Folding Rules, ofwhich the following is a specification, the principle of the inventionbeing' herein explained and the best mode in which I have contemplatedapplying that principle, so as to distinguish it from other inventions.

The present invention, relating, as indicated, to joints for foldingrules, is directed to an improved joint of extremely simple andinexpensive construction which may be used to connect the varioussections of folding rules. To the accomplishment of the foregoing andrelated ends, said invention, then, consists of the means hereinafterfully described and particularly pointed out in the claims. o

The annexed drawing and the, following description set forth in detailcertain mechanism embodying the invention, such dis-` closed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used.

ln said annexed drawing:-

Fig. l is a side elevation showing the .portion of a folding' rule inwhich my. improved joint is incorporated; Fig. 2 is a section on theline 2-2, Fig. l; Fig. 3 is a section on the line 8-3, in Fig. 2; Fig. 4is a plan view of one of the joint members or plat-es; Fig. 5 is asection on the line 5 5, Fig. 4; Fig. 6 is a section on the line 64-6,Fig. i; Fig. 7 is a pla-n view of the other of the two joint members orplates; Fig. 8 is a section on the line 8 8, Fig. 7 vand Fig. 9 is a.section on the line 9 9,

Fig. 7.

In Fig. l I have shown the sections l and 2 of a folding rule which arepivoted to swing about the same axis, which is in the form of a stud 3engaged in suitable registered openings in the two rule sections, theseopenings being provided with enlarged recesses at either end in order topermit the head members l and 5 of the stud 3 to be inset level with thesurface of the rule.

The oint members are in the form of thin rectangular metal plates 6 and7, which are attached to the two rule sections land 2, respectively.Each of these two members is provided with a series of sharp Lip-standnJoinfriiioitrotnine nonne. Y 'i y j Application mea november' is; isles`sei-lai Nq. 338,257.

ine' enea'ino luos-l 8 which are ressed from J 23 o b 2::

the body of the plate members and are forced into thev wood as the plateis pressed against the surface thereof. These lugs serve to securelyengagethe two plates on the rule sections.

shown, while the member 7 vis provided with two similarly disposedraised port-ions ll and l2., These raised portions are slightlyresilient and are sufficiently so to permit them to spring into therecesses or open at the samevt-ime allowing these raised portions torotate over thev members of the sur-y face 6 when thetwo rule portionsare pivoted with respect to each other.l rlfhe proro 'riin rinrninfnnnncontratti?,

Themember 6 is provided with two openings/9 and 10 of the formi,

ings Q'and 10 in the other plate 6,-while jections and recesses thusserve to exert 4a i The advantage of my improved jointvis that it avoidsthe necessity for beveling off the ends of lthe rule sections, as is-Vthe case with the standard joint nowin use, and also makes it'.unnecessary to recess the adjacent` faces of the sections for thepurpose of insetting the members. There is of course the slightdisadvantage that 'a rule constructed withmy joints is slightly thickerthan a rule. with inset joint members, but this disadvantage is veryslight and is greatly outweighed by the greater simplicity and cheapnessof the present joint. ,I

Other modes of applying the vprinciple of my inventionmay be employedinstead'of the one explained, change being made as regarde the mechanismherein disclosed, pro vided the `means stated by any of the followingclaims or the equivalent of such stated means be employed-M` j ltherefore particularly point out and distinctly claim as my invention lna device of the character described,jthe combination of two overlappingrule sections, plates of lesser width vthansaid sections mounted betweenthe adjacent faces thereof at the respective ends of said seciio tions,al pair of lugs pressed outwardly at right angles to the plane of eachplate at points spaced from the side edges centrally of each halfthereof, a stud holding each of said plates in engagement with itsrespective rule section, and serving as a pivot for said rule sections,one of said plates being pirovided on each side of said pivot With anupwardly pressed resilient projection lying at 10 an acute angle to theplane of said plat-e and having a beveled outer edge of semi-circularshape formed integrally With said plate, and the other of said plateshaving a pair of openings of a shape corresponding with saidproject-ions, and similarly spaced, to receive said projections whensaid rule sections are in open or closed position.

Signed by Ine, this 11th day of November,

FRED BUCK.

